Advanced Digital Signal Processing for Reach Fxtension and Performance Enhancement of 112 Gbps and Beyond Direct Detected DML-Based Transmission

作     者：Wang, Weiyu Li, Huanlu Zhao, Pengchao Zhang, Zhike Zang, Dajun Wang, Cuicui Li, Liang Ma, Lin Liu, Yu Zhu, Ninghua Lu, Yuchun 

作者机构：Huawei Technol Co Ltd Beijing 100095 Peoples R China Chinese Acad Sci Inst Semicond State Key Lab Integrated Optoelect Beijing 100864 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China 

出 版 物：《JOURNAL OF LIGHTWAVE TECHNOLOGY》 (J Lightwave Technol)

年 卷 期：2019年第37卷第1期

页      面：163-169页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0702[理学-物理学] 

主　　题：Data center interconnections digital signal processing directly modulated laser (DML) fiber optics communications semiconductor laser 

摘      要：112 Gbps per wavelength, amplification free Four level Pulse Amplitude Modulation (PAM-4) transmissions are experimentally demonstrated with advanced digital signal processing (DSP) algorithms. Two DSP architectures are investigated for Directly Modulated Lasers (DMLs): 1) the regular DSP with Feed Forward Equalization (FFE) and Decision Feedback Equalization (DFE), and 2) the enhanced DSP with Maximum Likelihood Sequence Estimation (MLSE) equalizer. The experimental results show that with advanced DSP technologies the conventional DML can achieve 40 km transmissions with Bit Error Rate (BER) under 2.4 x 10(-4) that meets RS (544, 514) Forward Error Correction (FEC) requirement;with regular-DSP the advanced DML can achieve 40 km transmissions with BER under 3.8 x 10(-3), with stronger FEC. 112 Gbps and beyond per lambda DML based transmission is a promising low power, low-cost solution for 800 GbE or 1.6 TbE Ethernet.